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Convective Storm Studies with the Synergistic Use of LEO Satellite Data and Imagery

Case study of the Del Rio, Texas severe hailstorm of 11 April 2020 featuring weather satellite and radar imagery.

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Convective Storm Studies with the Synergistic Use of LEO Satellite Data and Imagery

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  1. Convective Storm Studieswith theSynergistic Use of LEO Satellite Data and Imagery Ken Pryor NOAA/NESDIS/STAR

  2. Case Study: Del Rio, TX Severe Hailstorm11April 2020

  3. Demonstration of the synergistic use of LEO • satellite and ground-based weather radar • (NEXRAD) data for a severe hailstorm over • southern Texas on 11 April 2020: • During the evening of 11 April 2020, a large supercell • storm developed over northern Mexico, and then • tracked eastward through the Del Rio, TX area, • producing baseball-sized hail and strong, gusty winds. • For this event, afternoon NOAA-20 NUCAPS sounding • profile data was collected over south Texas, where a • direct overpass of NOAA-20 occurred at 1946 UTC. • In addition, microwave sensor data from DMSP F-17 • SSMIS and corresponding NEXRAD reflectivity data were • collected at the time of a direct overpass of F-17 over • the Del Rio area that occurred at 0109 UTC 12 April. • At this time, large hail, 1 to 4 inches in diameter, and • strong wind gusts up to 35 knots were being observed • in the Del Rio area. • The coordinated use of afternoon NOAA-20 NUCAPS • profile data, and evening coincident F-17 microwave • sensor and NEXRAD data revealed favorable • environmental and storm microphysical conditions for • large hail and damaging winds with this supercell storm. Large CAPE Mid-tropospheric Unsaturated layer Supercell storm

  4. NOAA-20/F-17 Overpass Tracks CDT (UTC-05:00)

  5. Del Rio, Texas RAOB/NUCAPS/MIRS Sounding Comparison MWPI = 3.7 WGP = 43 kt Mid-tropospheric Unsaturated layer Potential instability

  6. Courtesy of Daniel Schreiber, Strategic Weather Consulting: https://www.stwxstrategic.com/press-releases/significant-hail-storm-targets-del-rio-brackettville-widespread-giant-hail-observed

  7. Graupel water path Ice precip core

  8. SSMIS/NEXRAD Comparison Supercell storm Forward Flank Downburst

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